CN104451135B - Containing microfine coal and the agglomeration method of the pelletizing of ultra-fine calcium lime powder - Google Patents
Containing microfine coal and the agglomeration method of the pelletizing of ultra-fine calcium lime powder Download PDFInfo
- Publication number
- CN104451135B CN104451135B CN201410696688.1A CN201410696688A CN104451135B CN 104451135 B CN104451135 B CN 104451135B CN 201410696688 A CN201410696688 A CN 201410696688A CN 104451135 B CN104451135 B CN 104451135B
- Authority
- CN
- China
- Prior art keywords
- ultra
- lime powder
- calcium lime
- fine calcium
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of containing microfine coal with the agglomeration method of the pelletizing of ultra-fine calcium lime powder, including: microfine coal and ultra-fine calcium lime powder are mixed, in order to obtain containing microfine coal and the mixed material of ultra-fine calcium lime powder；The described mixed material containing microfine coal and ultra-fine calcium lime powder and coal tar are carried out mixing granulation, in order to obtain prefabricated grain granule；And be shaped processing by described prefabricated grain granule, in order to obtain containing microfine coal and the pelletizing of ultra-fine calcium lime powder.The method can effectively solve microfine coal and the problem of ultra-fine calcium lime powder mixed pelletizing difficulty, and obtained pelletizing has good cold strength and stability.
Description
Technical field
The invention belongs to chemical technology field, specifically, the present invention relates to a kind of containing microfine coal and ultra-fine calcium lime powder
The agglomeration method of pelletizing.
Background technology
In metallurgical and chemical industry, cheap fine coal and powder quick lime is utilized to carry out agglomeration, compared with lump coal and block quick lime,
The cost of raw material can be greatly reduced.But microfine coal and ultra-fine calcium lime powder agglomeration have difficult forming, can not use water
Property binding agent, pellet strength are poor, high in cost of production problem.
There are no coal dust and calcium lime powder at present by the way of cold moudling, carry out the report of agglomeration, more there are no microfine coal
With the report that ultra-fine calcium lime powder carries out agglomeration by cold moudling mode.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose a kind of containing microfine coal with the agglomeration method of the pelletizing of ultra-fine calcium lime powder, and the method can effectively solve to surpass
The problem that fine breeze and ultra-fine calcium lime powder mixed pelletizing are difficult, and obtained pelletizing has good cold strength and stable
Performance.
In one aspect of the invention, the present invention proposes a kind of containing microfine coal with the agglomeration side of the pelletizing of ultra-fine calcium lime powder
Method, including:
Microfine coal and ultra-fine calcium lime powder are mixed, in order to obtain containing microfine coal and the mixing of ultra-fine calcium lime powder
Material；
The described mixed material containing microfine coal and ultra-fine calcium lime powder and coal tar are carried out mixing granulation, in order to obtain pre-
Granulation granule；And
It is shaped described prefabricated grain granule processing, in order to obtain containing microfine coal and the pelletizing of ultra-fine calcium lime powder.
The agglomeration method containing microfine coal and the pelletizing of ultra-fine calcium lime powder according to embodiments of the present invention by by coal tar with contain
The mixed material having microfine coal and ultra-fine calcium lime powder carries out mixing granulation, owing to coal tar has certain adhesive property,
It is possible not only to play the effect of binding agent, and so that prefabricated grain particle surface forms one layer of hydrophobic passivation film,
Hinder the digestion reaction of ultra-fine calcium lime powder and water, so that obtained pelletizing has good chemical stability, simultaneously
By mixed material being made prefabricated grain granule, bulk density and the plasticity of material can be significantly improved, thus follow-up
Moulding process, and then obtained pelletizing has good cold strength and stability, it addition, coal tar can be at pelletizing
Following process during recycle, thus significantly reduce agglomeration cost.
It addition, the agglomeration method containing microfine coal and the pelletizing of ultra-fine calcium lime powder according to the above embodiment of the present invention is all right
There is following additional technical characteristic:
In some embodiments of the invention, the mean diameter of described microfine coal and described ultra-fine calcium lime powder is separately
For no more than 75 microns.Thus, it is possible to significantly improve the dispersibility of material in pelletizing.
In some embodiments of the invention, in described microfine coal, moisture is not higher than 3wt%.Thus, it is possible to significantly carry
The chemical stability of high pelletizing.
In some embodiments of the invention, the addition of described coal tar is described containing microfine coal with ultra-fine calcium lime powder
Mixed material quality 20～40%.Thus, it is possible to improve the chemical stability of pelletizing further.
In some embodiments of the invention, in described coal tar, moisture is not higher than 2wt%.Thus, it is possible to carry further
The chemical stability of high pelletizing.
In some embodiments of the invention, the mean diameter of described prefabricated grain granule is 1～3 millimeter.Thus, it is possible to substantially
Promote that subsequent forming processes.
In some embodiments of the invention, the described mean diameter containing microfine coal and the pelletizing of ultra-fine calcium lime powder is 20～80
Millimeter.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become bright from the following description
Aobvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is according to an embodiment of the invention containing microfine coal and the flow process of the agglomeration method of the pelletizing of ultra-fine calcium lime powder
Schematic diagram.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ",
Orientation or the position relationship of the instruction such as " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
Person implies the quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two,
Three etc., unless otherwise expressly limited specifically.
In one aspect of the invention, the present invention proposes a kind of containing microfine coal with the agglomeration side of the pelletizing of ultra-fine calcium lime powder
Method.Below with reference to Fig. 1, the agglomeration method containing microfine coal and the pelletizing of ultra-fine calcium lime powder of the embodiment of the present invention is carried out in detail
Thin description.According to embodiments of the invention, the method includes:
S100: microfine coal and ultra-fine calcium lime powder are mixed
According to embodiments of the invention, microfine coal and ultra-fine calcium lime powder are mixed, such that it is able to obtain containing ultra-fine
Coal dust and the mixed material of ultra-fine calcium lime powder.Thus, it is possible to significantly improve the dispersibility of material in pelletizing.
According to embodiments of the invention, the particle diameter of microfine coal and ultra-fine calcium lime powder is not particularly restricted, according to the present invention
Specific embodiment, the mean diameter of microfine coal and calcium lime powder can be no more than 75 microns.Inventor finds, if grain
Footpath is too high, and the specific surface area of coal dust diminishes, and during prefabricated grain, granule binding ability is strong, causes obtained prefabricated
The intensity of grain is deteriorated.
According to embodiments of the invention, in microfine coal, moisture is not particularly restricted, being embodied as according to the present invention
Example, the moisture in microfine coal can be not higher than 3wt%.Inventor finds, if moisture is too high in coal dust, and calculogenesis
Ashes can react generation slaked lime with the water in coal dust so that volume of material expands, and discharges substantial amounts of heat so that
Temperature of charge raises (Ignition Phenomena even occurs), thus causes the stability of pelletizing to significantly reduce.
In this step, concrete, microfine coal is uniformly mixed in batch mixer with ultra-fine calcium lime powder, persistently mixing 5～10
Minute, such that it is able to obtain containing microfine coal and the mixed material of ultra-fine calcium lime powder.
S200: mixed material and coal tar are carried out mixing granulation
According to embodiments of the invention, will mix with coal tar containing the mixed material of microfine coal and ultra-fine calcium lime powder
Pelletize, such that it is able to obtain prefabricated grain granule.Inventor finds, by by coal tar and containing microfine coal and ultra-fine calculogenesis
The mixed material of ashes carries out mixing granulation, owing to coal tar has certain adhesive property, is possible not only to play binding agent
Effect, and so that prefabricated grain particle surface formed one layer of hydrophobic passivation film, hinder ultra-fine calcium lime powder with
The digestion reaction of water, so that obtained pelletizing has good chemical stability, simultaneously pre-by mixed material is made
Granulation granule, can significantly improve bulk density and the plasticity of material, thus follow-up moulding process, and then obtained
Pelletizing there is good cold strength and stability, it addition, coal tar can be carried out during the following process of pelletizing
Recycle, thus significantly reduce agglomeration cost.
According to embodiments of the invention, the addition of coal tar is not particularly restricted, according to a particular embodiment of the invention,
The addition of coal tar can be 20～40% of the mixed material quality containing microfine coal and ultra-fine calcium lime powder.Invention Crinis Carbonisatus
Existing, if the addition of coal tar is too low, easily makes the intensity of prefabricated grain be deteriorated, and addition is too high, causes material to stick into
One, it is impossible to form scattered little granule.
According to embodiments of the invention, in coal tar, moisture is not particularly restricted, according to a particular embodiment of the invention,
The moisture of coal tar can be not higher than 2wt%.Inventor finds, if moisture is too high in coal tar so that coal tar
W/O and quick lime react generation slaked lime so that pelletizing volumetric expansion, thus significantly reduce the stability of pelletizing.
According to embodiments of the invention, the particle diameter of prefabricated grain granule is not particularly restricted, according to a particular embodiment of the invention,
The mean diameter of prefabricated grain granule can be 1～3 millimeter.Inventor finds, prefabricated grain grain diameter is too high or too low the most unfavorable
In follow-up agglomeration, and affect pellet strength.
In this step, concrete, can in the way of using sprinkling by coal tar with containing microfine coal and ultra-fine calcium lime powder
Mixed material carries out mixing granulation in granulating disc so that mixed material mixes more uniform with coal tar, such that it is able to
Obtain prefabricated grain granule.
S300: be shaped prefabricated grain granule processing
According to embodiments of the invention, it is shaped prefabricated grain granule processing, it is hereby achieved that containing microfine coal and ultra-fine
The pelletizing of calcium lime powder.Thus, it is possible to prepare the pelletizing with good cold strength and stability.
According to embodiments of the invention, the particle diameter of pelletizing is not particularly restricted, according to a particular embodiment of the invention, and pelletizing
Mean diameter can be 20～80 millimeters.Inventor finds, if pelletizing particle diameter is too high, can affect follow-up coal tar oil recovery
Utilize, thus increase energy consumption, and pelletizing particle diameter is too low, causes pellet strength to decline.
In this step, concrete, owing to mixed material to be made prefabricated grain granule, can significantly improve material bulk density and
Plasticity, thus significantly reduce the operation pressure of forming processes, thus the prefabricated grain granule obtained can be put into roller briquetting machine
In carry out that mesolow is extruded i.e. can get the irregular pelletizing of length, and then significantly reduce energy consumption.
The agglomeration method containing microfine coal and the pelletizing of ultra-fine calcium lime powder according to embodiments of the present invention by by coal tar with contain
The mixed material having microfine coal and ultra-fine calcium lime powder carries out mixing granulation, owing to coal tar has certain adhesive property,
It is possible not only to play the effect of binding agent, and so that prefabricated grain particle surface forms one layer of hydrophobic passivation film,
Hinder the digestion reaction of ultra-fine calcium lime powder and water, so that obtained pelletizing has good chemical stability, simultaneously
By mixed material being made prefabricated grain granule, bulk density and the plasticity of material can be significantly improved, thus follow-up
Moulding process, and then obtained pelletizing has good cold strength and stability, it addition, coal tar can be at pelletizing
Following process during recycle, thus significantly reduce agglomeration cost.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are the most descriptive
, and limit the present invention never in any form.
Embodiment 1
Preparation method: first mixed with the ultra-fine calcium lime powder of 50g by the microfine coal of 100g, mixes 5 minutes,
To containing microfine coal and the mixed material of ultra-fine calcium lime powder, then use the mode of sprinkling by coal tar and containing fine Coal
The mixed material of powder and ultra-fine calcium lime powder carries out mixing granulation in granulating disc, obtains prefabricated grain granule, wherein, coal
The addition of tar is 30g, and the prefabricated grain granule obtained finally puts into carry out mesolow in roller briquetting machine extruded,
Such that it is able to obtain containing microfine coal and the pelletizing of ultra-fine calcium lime powder.
The obtained density containing microfine coal Yu the pelletizing of ultra-fine calcium lime powder is 1.25g/cm3, comprcssive strength is 365N/,
And according to the standard of metallurgy industry, highly falling to steel plate from 0.5 meter, average energy falls 13 times.
Embodiment 2
Preparation method: first mixed with the ultra-fine calcium lime powder of 140g by the microfine coal of 100g, mixes 8 minutes,
Obtain containing microfine coal and the mixed material of ultra-fine calcium lime powder, then use the mode of sprinkling by coal tar with containing ultra-fine
The mixed material of coal dust and ultra-fine calcium lime powder carries out mixing granulation in granulating disc, obtains prefabricated grain granule, wherein,
The addition of coal tar is 60g, and the prefabricated grain granule obtained finally puts into carry out mesolow in roller briquetting machine extruded,
Such that it is able to obtain containing microfine coal and the pelletizing of ultra-fine calcium lime powder.
The obtained density containing microfine coal Yu the pelletizing of ultra-fine calcium lime powder is 1.42g/cm3, comprcssive strength is 572N/,
And according to the standard of metallurgy industry, highly falling to steel plate from 0.5 meter, average energy falls 18 times.
Embodiment 3
Preparation method: first mixed with the ultra-fine calcium lime powder of 200g by the microfine coal of 100g, mixes 10 minutes,
Obtain containing microfine coal and the mixed material of ultra-fine calcium lime powder, then use the mode of sprinkling by coal tar with containing ultra-fine
The mixed material of coal dust and ultra-fine calcium lime powder carries out mixing granulation in granulating disc, obtains prefabricated grain granule, wherein,
The addition of coal tar is 105g, and the prefabricated grain granule obtained finally puts into carry out mesolow in roller briquetting machine extruded,
Such that it is able to obtain containing microfine coal and the pelletizing of ultra-fine calcium lime powder.
The obtained density containing microfine coal Yu the pelletizing of ultra-fine calcium lime powder is 1.40g/cm3, comprcssive strength is 423N/,
And according to the standard of metallurgy industry, highly falling to steel plate from 0.5 meter, average energy falls 16 times.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (5)
1. the agglomeration method of the pelletizing containing microfine coal and ultra-fine calcium lime powder, it is characterised in that including:
Microfine coal and ultra-fine calcium lime powder are mixed, in order to obtain containing microfine coal and the mixing of ultra-fine calcium lime powder
Material；
The described mixed material containing microfine coal and ultra-fine calcium lime powder and coal tar are carried out mixing granulation, in order to obtain pre-
Granulation granule；And
It is shaped described prefabricated grain granule processing, in order to obtain containing microfine coal and the pelletizing of ultra-fine calcium lime powder,
Wherein,
The mean diameter of described microfine coal and described ultra-fine calcium lime powder is separately no more than 75 microns,
The addition of described coal tar is described containing microfine coal and the 20～40% of the mixed material quality of ultra-fine calcium lime powder.
Method the most according to claim 1, it is characterised in that in described microfine coal, moisture is not higher than 3wt%.
Method the most according to claim 1, it is characterised in that in described coal tar, moisture is not higher than 2wt%.
Method the most according to claim 1, it is characterised in that the mean diameter of described prefabricated grain granule is 1～3 millimeter.
Method the most according to claim 1, it is characterised in that described containing microfine coal with the pelletizing of ultra-fine calcium lime powder
Mean diameter be 20～80 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410696688.1A CN104451135B (en) | 2014-11-26 | 2014-11-26 | Containing microfine coal and the agglomeration method of the pelletizing of ultra-fine calcium lime powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410696688.1A CN104451135B (en) | 2014-11-26 | 2014-11-26 | Containing microfine coal and the agglomeration method of the pelletizing of ultra-fine calcium lime powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104451135A CN104451135A (en) | 2015-03-25 |
| CN104451135B true CN104451135B (en) | 2016-12-07 |
Family
ID=52897877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410696688.1A Expired - Fee Related CN104451135B (en) | 2014-11-26 | 2014-11-26 | Containing microfine coal and the agglomeration method of the pelletizing of ultra-fine calcium lime powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104451135B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105860926A (en) * | 2016-06-02 | 2016-08-17 | 神雾环保技术股份有限公司 | Composite bonding agent, long-flame-coal-powder and quicklime-powder mixture pellet and preparing method |
| CN106590797A (en) * | 2016-12-16 | 2017-04-26 | 北京神雾环境能源科技集团股份有限公司 | Lignite molding method |
| CN109734096B (en) * | 2019-03-13 | 2024-01-30 | 北京双零矿山装备技术有限公司 | Method and system for producing calcium carbide |
| CN109734095A (en) * | 2019-03-13 | 2019-05-10 | 北京双零矿山装备技术有限公司 | A method of with coal dust and calcium lime powder preparation production calcium carbide pelletizing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010032527A1 (en) * | 1998-09-25 | 2001-10-25 | Mitsubishi Heavy Industries, Ltd. | Method of producing reduced iron and production facilities therefor |
| CN101172605A (en) * | 2007-09-28 | 2008-05-07 | 李书堂 | Method for producing calcium carbide |
| RU2371385C1 (en) * | 2008-10-10 | 2009-10-27 | Открытое акционерное общество "Ленинградсланец" | Method of producing calcium carbide |
| CN102225765A (en) * | 2011-05-10 | 2011-10-26 | 云南邦特新材料有限公司 | Mixed pellets composed of fine coal powder and limestone powder for producing calcium carbide |
| CN102275920A (en) * | 2011-05-31 | 2011-12-14 | 宁夏兴平精细化工股份有限公司 | Method for synthesizing calcium carbide smelting raw material by extruding calcined coal powder and lime powder |
-
2014
- 2014-11-26 CN CN201410696688.1A patent/CN104451135B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010032527A1 (en) * | 1998-09-25 | 2001-10-25 | Mitsubishi Heavy Industries, Ltd. | Method of producing reduced iron and production facilities therefor |
| CN101172605A (en) * | 2007-09-28 | 2008-05-07 | 李书堂 | Method for producing calcium carbide |
| RU2371385C1 (en) * | 2008-10-10 | 2009-10-27 | Открытое акционерное общество "Ленинградсланец" | Method of producing calcium carbide |
| CN102225765A (en) * | 2011-05-10 | 2011-10-26 | 云南邦特新材料有限公司 | Mixed pellets composed of fine coal powder and limestone powder for producing calcium carbide |
| CN102275920A (en) * | 2011-05-31 | 2011-12-14 | 宁夏兴平精细化工股份有限公司 | Method for synthesizing calcium carbide smelting raw material by extruding calcined coal powder and lime powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104451135A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104451135B (en) | Containing microfine coal and the agglomeration method of the pelletizing of ultra-fine calcium lime powder | |
| CN104556039B (en) | The method for preparing solid-state calcium carbide | |
| CN108699623B (en) | Method for producing sintered ore | |
| JP2008261016A (en) | Method for manufacturing sintered ore | |
| CN102482729B (en) | Method For Producing Starting Material For Sintering | |
| CN1042651C (en) | Manufacture method of vanadic titanium type ultra-high basicity agglomerate | |
| CN106882843B (en) | A kind of preparation method of densification crystal form cobaltosic oxide | |
| CN104480302B (en) | Agglomerating method of pellets containing superfine pulverized coal and superfine quicklime powder | |
| JP2014148727A (en) | Briquette production method | |
| JP6333982B2 (en) | Method and apparatus for forming granules | |
| JP2009052138A (en) | Process for producing carbonaceous-material-including metal oxide briquette | |
| CN105087974A (en) | Aluminum alloy manganese additive and preparation method thereof | |
| CN1264994C (en) | Process for preparing slag by pelletization of steel-making dust slime | |
| AU2014294413B2 (en) | Method for manufacturing briquettes and reduced iron | |
| JP6683155B2 (en) | Method for producing granules containing carbon material | |
| CN104494195B (en) | Method for agglomerating pellets containing ultrathin coal powder and ultrathin quicklime powder | |
| WO2018194014A1 (en) | Method for producing sintered ore | |
| CN106574323A (en) | Method for smelting nickel oxide ore | |
| JPH05263155A (en) | Production of sintered or pelletized ore as blast-furnace material using lime cake | |
| JP4204789B2 (en) | Method for granulating raw materials for iron making | |
| JPS6256533A (en) | Method for pelletizing mixed material for sintering | |
| CN105441669A (en) | Method of improving air permeability of fully refined powder sintered material layer | |
| JP2014181369A (en) | Method of producing reduced iron | |
| CN113444853B (en) | Fine-particle Mg-CaO composite desulfurizer, preparation method thereof and molten iron pre-desulfurization method | |
| JPS6052532A (en) | Pretreatment of starting material for sintering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160224 Address after: 100016 Beijing City, Chaoyang District Road No. 5, building 15, floor 7 block C Applicant after: SHENWU ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Applicant before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20181126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |